Patent US3140489A successfully refreshed from Google Patents.
US3140489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulated pulse radar system
Assignee: General Electric Co
•
Filing: 1961-10-12
•
Granted: 1964-07-07
•
Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 John W Downie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:45
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28; G01S13/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A RADAR SYSTEM COMPRISING MEANS FOR GENERATING PULSES OF HIGH FREQUENCY ENERGY WHOSE INSTANTANEOUS FREQUENCY VARIES AT A PREDETERMINED RATE DURING SAID PULSES, MEANS FOR RECEIVING ECHOES RESULTING FROM THE REFLECTION OF SAID PULSES FROM OBJECTS, MEANS FOR GENERATING OSCILLATIONS WITH A REPETITIVE FREQUENCY VARIATION OCCURRING AT SAID RATE BETWEEN PREDETERMINED LIMITS, MEANS FOR COMBINING SAID ECHOES AND SAID OSCILLATIONS TO PRODUCE SIGNALS OF CONSTANT FREQUENCY OCCURRING WITHIN A BAND, A PLURALITY OF AMPLIFIERS TUNED TO DIFFERENT FREQUENCIES WITHIN SAID BAND, MEANS FOR APPLYING SAID PRODUCED SIGNALS TO SAID AMPLIFIERS FOR AMPLIFICATION THEREBY, AND MEANS RESPONSIVE SUCCESSIVELY TO EACH OF THE AMPLIFIED SIGNALS FOR PROVIDING AN INDICATION OF THE RANGE OF SAID OBJECTS IN ACCORDANCE WITH THE TIME INTERVALS BETWEEN SAID SIGNALS.
Claim 2
Dependent Claim
122 words
A RADAR SYSTEM COMPRISING MEANS FOR GENERATING PULSES OF HIGH FREQUENCY ENERGY WHOSE INSTANTANEOUS FREQUENCY VARIES AT A PREDETERMINED RATE DURING SAID PULSES, MEANS FOR RECEIVING ECHOES RESULTING FROM THE REFLECTION OF SAID PULSES FROM OBJECTS, MEANS FOR GENERATING OSCILLATIONS WITH A REPETITIVE FREQUENCY VARIATION OCCURRING AT SAID RATE BETWEEN PREDETERMINED LIMITS, MEANS FOR COMBINING SAID ECHOES AND SAID OSCILLATIONS TO PRODUCE SIGNALS OF CONSTANT FREQUENCY OCCURRING WITHIN A BAND, A PLURALITY OF AMPLIFIERS TUNED TO DIFFERENT FREQUENCIES WITHIN SAID BAND, MEANS FOR APPLYING SAID PRODUCED SIGNALS TO SAID AMPLIFIERS FOR AMPLIFICATION THEREBY, AND MEANS RESPONSIVE SUCCESSIVELY TO EACH OF THE AMPLIFIED SIGNALS FOR PROVIDING AN INDICATION OF THE RANGE OF SAID OBJECTS IN ACCORDANCE WITH THE TIME INTERVALS BETWEEN SAID SIGNALS.
References Cited (Backward Citations)
US2423644A
Cited
US2435615A
Cited
US2433804A
Cited
US2522367A
Cited
US2525328A
Cited
US2476445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |